LF45ABP datasheet(1/34 Pages) STMICROELECTRONICS

Part #	LF45ABP

Description	VERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT

PDF	34 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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August 2003

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VERY LOW DROPOUT VOLTAGE (0.45V)

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VERY LOW QUIESCENT CURRENT (TYP.

50 µA IN OFF MODE, 500 µA IN ON MODE)

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OUTPUT CURRENT UP TO 500 mA

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LOGIC-CONTROLLED ELECTRONIC

SHUTDOWN

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OUTPUT VOLTAGES OF 1.25; 1.5; 1.8; 2.5;

2.7; 3; 3.3; 3.5; 4; 4.5; 4.7; 5; 5.2; 5.5; 6; 8;

8.5; 9; 12V

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INTERNAL CURRENT AND THERMAL LIMIT

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ONLY 2.2 µF FOR STABILITY

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AVAILABLE IN ± 1% (AB) OR ± 2% (C)

SELECTION AT 25 °C

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SUPPLY VOLTAGE REJECTION: 80db (TYP.)

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TEMPERATURE RANGE: -40 TO 125 °C

DESCRIPTION

The LF00 series are very Low Drop regulators

available in PENTAWATT, TO-220, TO-220FP,

DPAK and PPAK package and in a wide range of

output voltages.

The very Low Drop voltage (0.45V) and the very

low quiescent current make them particularly

suitable for Low Noise, Low Power applications

and specially in battery powered systems.

In the 5 pins configuration (PENTAWATT and

PPAK) a Shutdown Logic Control function is

available (pin 2, TTL compatible). This means that

when the device is used as a local regulator, it is

possible to put a part of the board in standby,

decreasing the total power consumption. In the

three terminal configuration the device has the

same electrical performance, but is fixed in the ON

state. It requires only a 2.2 µF capacitor for

stability allowing space and cost saving.

LF00

SERIES

VERY LOW DROP

VOLTAGE REGULATORS WITH INHIBIT

SCHEMATIC DIAGRAM

TO-220

PENTAWATT

DPAK

PPAK

TO-220FP

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